What does code P23DB mean?

Q: What does code P23DB mean?

Cylinder 3 Fuel Heater Control Circuit Low. P23DB indicates that the powertrain control module (PCM) has detected an abnormally low voltage on the control circuit for the fuel heater built into cylinder 3's fuel injector. The PCM expects to see a voltage within a specific range when the heater is commanded on, and a low reading tells it the circuit is shorted to ground or the heater element has failed.

DTC codes / P23xx · Ignition system and misfire / P23DB

P23DBCylinder 3 Fuel Heater Control Circuit Low

P23DB indicates that the powertrain control module (PCM) has detected an abnormally low voltage on the control circuit for the fuel heater built into cylinder 3's fuel injector. The PCM expects to see a voltage within a specific range when the heater is commanded on, and a low reading tells it the circuit is shorted to ground or the heater element has failed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.